Label feed control system

Abstract

In a label feed control system, a label separated from the base ribbon is fed for a predetermined amount after the front edge thereof has been detected, so that the label can be positioned accurately irrespective of the light transmissivity of the base ribbon and labels.

What is claimed is: 
     
       1. A label feed control system comprising a driver means for driving a feed means which transports a paper base ribbon with labels lightly adhered thereon, a separator means for peeling said label off said base ribbon, a label detector disposed adjacent said separator means for detecting a peeled-off front edge of said label while said label adheres to said base ribbon and after the front edge is peeled off said base ribbon by said separator means, and an incremental feed means for controlling the operation of said driver means such that said base ribbon is fed for a certain amount after said label detector has detected the peeled-off front edge of said label. 
     
     
       2. A label feed control system according to claim 1, wherein said driver means comprises an electric motor which rotates in synchronization with the power frequency, said incremental feed means determining the amount of feed by counting said power frequency. 
     
     
       3. A label feed control system according to claim 1, wherein said driver means comprises a stepping motor which rotates under control of signals supplied from an oscillator, said incremental feed means determining the amount of feed by counting pulses from said oscillator. 
     
     
       4. A label feed control system comprising a driver means for driving a feed means which transports a paper base ribbon with labels lightly adhered thereon, a separator means for peeling said label off said base ribbon, a label detector disposed adjacent said separator means for detecting a peeled off front edge of said label while said label adheres to said base ribbon and after the front edge is peeled off said base ribbon by said separator means, an incremental feed means for controlling the operation of said drive means such that said base ribbon is fed for a certain amount after said label detector has detected the peeled-off front edge of said label, said incremental feed means operating under numerical control, and a feed amount setup means for variably presetting the amount of incremental feed numerically. 
     
     
       5. A label feed control system comprising a driver means for driving a feed means which transports a paper base ribbon with labels lightly adhered thereon, a separator means for peeling said label off said base ribbon, a label detector disposed adjacent said separator means for detecting a peeled-off front edge of said label while said label adheres to said base ribbon and after the front edge is peeled-off said base ribbon by said separator means, and an incremental feed means for controlling the operation of said driver means such that said base ribbon is fed for a certain amount after said label detector has detected the peeled-off front edge of said label, said incremental feed means operating under numerical control, the amount of incremental feed being entered into a RAM within a CPU by use of a display means and a ten-key means so that the amount of feed by said incremental feed means is set by data in said RAM. 
     
     
       6. A label feed control system comprising a feed roller for transporting intermittently a paper base ribbon with labels lightly adhered thereon, a driver means for driving said feed roller, a separator means for peeling said label off said base ribbon while said base ribbon is bent on said separator means, a slit disk operable to rotate in synchronization with said feed roller, a slit detector for detecting slits on said slit disk, a label detector disposed adjacent said separator means for detecting a peeled-off front edge of said label while said label adheres to said base ribbon and after the front edge is peeled-off said base ribbon by said separator means, and an incremental feed means for feeding said base ribbon for a certain amount by counting signals from said slit detector upon reception of a front edge detection signal from said label detector. 
     
     
       7. A label feed control system comprising a feed roller for transporting intermittently a paper base ribbon with labels lightly adhered thereon, a driver means for driving said feed roller, a separator means for peeling said label off said base ribbon while said base ribbon is bent on said separator means, a slit disk operable to rotate in synchronization with said feed roller, a slit detector for detecting slits on said slit disk, a label detector disposed adjacent said separator means for detecting a peeled-off front edge of said label while said label adheres to said base ribbon and after the front edge is peeled-off said base ribbon by said separator means, and an incremental feed means for feeding said base ribbon for a certain amount by counting signals from said slit detector upon reception of a front edge detection signal from said label detector, the position in which said peeled-off label is stopped being set to a position detected by said label detector, said label detector also serving for detecting the presence of said label. 
     
     
       8. A label feed control system comprising a feed roller for transportin intermittently a paper base ribbon with labels lightly adhered thereon, a drive means for driving said feed roller, a separator means for peeling said label off said base ribbon while said base ribbon is bent on said separator means, a slit disk operable to rotate in synchronization with said feed roller, a slit detector for detecting slits on said slit disk, a label detector disposed adjacent said separator means for detecting a peeled-off front edge of said label while said label adheres to said base ribbon and after the front edge is peeled-off said base ribbon by said separator means, and an incremental feed means for feeding said base ribbon for a certain amount by coutning signals from said slit detector upon reception of a front edge detection signal from said label detector, and an overrun detector for detecting the overrun of said base ribbon by receiving said signals from said slit detector. 
     
     
       9. A label feed control system comprising a feed roller for transporting intermittently a paper base ribbon with labels lightly adhered thereon, a drive means for driving said feed roller, a separator means for peeling said label off said base ribbon while said base ribbon is bent on said separator means, a slit disk operable to rotate in synchronization with said feed roller, a slit detector for detecting slits on said slit disk, a label detector disposed adjacent said separator means for detecting a peeled-off front edge of said label while said label adheres to said base ribbon and after the front edge is peeled-off said base ribbon by said separator means, and an incremental feed means for feeding said base ribbon for a certain amount by counting signals from said slit detector upon reception of a front edge detection signal from said label detector, and a further incremental feed means for feeding said base ribbon for an amount corresponding to a predetermined number of signal from said slit detector while said base ribbon travels from its reference position to a position in which the front edge of said label is detected by said label detector. 
     
     
       10. A label feed control system comprising a feed roller for transporting intermittently a paper base ribbon with labels lightly adhered thereon, a drive means for driving said feed roller, a separator means for peeling said label off said base ribbon while said base ribbon is bent on said separator means, a slit disk operable to rotate in synchronization with said feed roller, a slit detector for detecting slits on said slit disk, a label detector disposed adjacent said separator means for detecting a peeled-off front edge of said label while said label adheres to said base ribbon and after the front edge is peeled-off said base ribbon by said separator means, and in incremental feed means for feeding said base ribbon for a certain amount by counting a predetermined number of signals from said feed amount detector upon reception of a front edge detection signal from said label detector. 
     
     
       11. A label feed control system comprising a feed roller for transporting intermittently a paper base ribbon with labels lightly adhered thereon, a drive means for driving said feed roller, a separator means for peeling said label off said base ribbon while said base ribbon is bent on said separator means, a slit disk operable to rotate in synchonization with said feed roller, a slit detector for detecting slits on said slit disk, a label detector disposed adjacent said separator means for detecting a peeled-off front edge of said label while said label adheres to said base ribbon and after the front edge is peeled-off said base ribbon by said separator means, and an incremental feed means for feeding said base ribbon for a certain amount by counting signals from said slit detector upon reception of a front edge detection signal from said label detector, the number of signals counted by said incremental feed means corresponding to a print format selected by said print format selector means.